What Do I Need To Consider If I Want To Go To Australia From Philippines With Visitor (tourist) Visa?

What is the first step to do?
Documents needed?
How much money should I prepare?
How long would it take for me to get a Visitor Visa?
Do I need someone to sponsor me to go there for Tourist Visa?
How can I arrange hotel for my stay?
Is travel agency in Philippines enough to do this all?
Other things I should consider?